For more than a decade, Theresa Caputo — known worldwide as the Long Island Medium, and star of the forthcoming new Lifetime Series “Raising Spirits” — has touched the lives of millions of fans, comforting supporters when they need it most. Through personal life stories, candid humor, and intimate details about her gift to communicate with those who have passed on, the beloved television personality and best-selling author delivers healing messages to her audience, reassuring them with the revelation that their deceased loved ones are still with them — just in a different way. Tonight she returns to Chevalier Theatre for “Theresa Caputo Live: The Experience.” Tickets are $49 to $140 through the Chevalier Theatre website/Ticketmaster. To avoid online ordering fees, purchase tickets at the Chevalier Theatre Box Office, which is open on Fridays and Saturdays from noon to 6 p.m., as well as two hours before every Chevalier Theatre show.